At least 12 fatalities have been reported in Missouri, according to the Missouri State Emergency Management Agency. The deaths come as a massive storm system moving across the country unleashed winds that damaged buildings, whipped up deadly dust storms and fanned more than 100 wildfires.

A cross-country storm will explode in strength as it moves over the central United States Friday, delivering extreme weather to millions through the weekend, including the chance of multiple strong tornadoes.

A sprawling storm system crossing the U.S. has overturned semitrucks on highways and fanned wildfires in Texas, Oklahoma, Missouri and Kansas. Tornado threats loom for the Mississippi Valley into the